Peptic Ulcers:

• Erosions of the mucosa can lead to peptic ulcers (stomach digests itself) • Result of infection of the GT tract in ~50% of adults worldwide • Nobel prize win for recognizing that that peptic ulcers are due to common bacteria Hlicobacter pylori degrading the mucosal membrane, rather than due to spicy foodTreat with antibiotics

7

Duodenum

§ First 25cmMucous secretion, receives pancreatic secretions and bile from the liver